Telephone system calculator



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1. CALCULATOR APPARATUS FOR DEVELOPING SIGNALS REPRESENTATIVE OF TOTAL ASSESSED CHARGES FOR TELEPHONE COMMUNICATION SERVICES COMPRISING: MEANS RESPONSIVE TO APPLIED RATE INFORMATION FOR DERIVING A SIGNAL INDICATIVE OF AN INITIAL SERVICE CHARGE FOR A PREDETERMINED INTERVAL OF TIME, MEANS FOR SUPPLEMENTING SAID INITIAL SERVICE CHARGE SIGNAL BY AN AMOUNT REPRESENTING A TAX PERCENTAGE THEREOF IN ACCORDANCE WITH A PRESCRIBED FORMAT, MEANS RESPONDIVE TO SAID APPLIED RATE INFORMATION FOR DERIVING A SIGNAL INDICATIVE OF AN OVERTIME SERVICE CHARGE FOR A SUBSEQUENT INTERVAL OF TIME, MEANS FOR DERIVING A SIGNAL REPRESENTATIVE OF A TAX PERCENTAGE OF THE SUM OF SAID INITIAL AND OVERTIME CHARGE SIGNALS IN ACCORDANCE WITH A PRESCRIBED FORMAT, AND MEANS FOR SUPPLEMENTING SAID OVERTIME SERVICE CHARGE SIGNAL BY AN AMOUNT CORRESPONDING TO THE DIFFERENCE BETWEEN SAID TWO REPRESENTATIVE TAX SIGNALS TO DRIVE A TOTAL ASSESSED SERVICE CHARGE FOR SAID SUBSEQUENT INTERVAL OF TIME. 